He blocked me as soon as I brought up marriage

I don’t really know why I’m posting this. Maybe I just need to get it off my chest.
I was talking to a guy I genuinely fell in love with. Things seemed to be going well, and I thought we were on the same page. But the moment I started bringing up marriage and wanting something serious, everything changed. He became distant, and eventually he blocked me without any real explanation.
I’m not saying we had to get married right away. I just wanted to know if we were heading in the same direction because I didn’t want to waste either of our time

I’m honestly heartbroken. Since it happened, I’ve barely been able to sleep or eat properly. My mind keeps replaying everything, wondering what I did wrong and why he couldn’t just be honest with me instead of blocking me.